1. Automatic Transmissions Products
  2. sku: 23094393204249771
  3. MERCEDES 1162702301

MERCEDES 1162702301 Automatic Transmission Gearbox 400-51587 Benz 78-80

fits model: 300sd, W116. make: Mercedes.

1162702301 Mercedes-benz 78-80 300sd W116 Automatic Transmission Gearbox 4 Speed Oem

( Manufacturer Part Number: 1162702301 ), ( Type: Transmission ), ( Manufacturer Warranty: 30 Day ), ( Country Of Origin: Germany ), ( Performance Part: No ), ( Ipn: 400-51587 ), ( Make: Mercedes-benz )

Review MERCEDES benz 78-80 Automatic Transmission Gearbox Speed Oem fits 300SD W116

The **Mercedes-Benz 1162702301 78-80 300SD W116 Automatic Transmission Gearbox** is a meticulously engineered component from the iconic **W116 series**, a generation renowned for its blend of luxury, performance, and timeless elegance. This gearbox, originally fitted to the legendary **300 SD (Diesel) model**, represents the pinnacle of Mercedes-Benz s mid-1970s engineering, where precision craftsmanship meets the demands of both urban sophistication and long-distance reliability. Built to exacting standards, this **4-speed automatic transmission** (with an optional overdrive option in later models) features a robust **hydraulic valve body** and a **torque converter** designed to seamlessly interface with the **OM617 3.0L inline-six diesel engine**, delivering smooth power delivery while maintaining the signature Mercedes-Benz driving dynamics. The gearbox s **helical cut gears** ensure quiet operation and efficient power transfer, while the **heavy-duty planetary gear set** provides durability for both city stop-and-go traffic and extended highway cruising. This transmission is particularly sought after by enthusiasts and restorers for its **classic yet robust construction**, often requiring minimal modification to fit modern applications while retaining its original performance characteristics. Whether integrated into a fully restored W116 sedan or repurposed into a custom project, this gearbox embodies the **uncompromising quality** that defined Mercedes-Benz s golden era, offering a perfect blend of heritage, functionality, and enduring value for those who appreciate automotive excellence.

### **Pros and Cons of Buying a Mercedes-Benz W116 300SD (1978 1980) with Automatic Transmission (Gearbox: 1162702301)**

#### **Pros:**

1. **Classic Mercedes-Benz Prestige**

The W116 series, particularly the 300SD, is one of the most iconic and desirable Mercedes-Benz models from the 1970s. Its timeless design, luxury interior, and brand reputation make it a sought-after collector s car.

2. **Reliable Diesel Engine (M116 OM617 2.8L)**

The 300SD features a robust 2.8L inline-six diesel engine (OM617), known for its durability and longevity when properly maintained. Diesel engines of this era are less prone to common issues like timing belt failures (though they do require regular oil changes and maintenance).

3. **Smooth Automatic Transmission (4-speed 1162702301)**

The 4-speed automatic (A40AM) in this model is generally reliable if well-maintained. Unlike some older automatics, it does not suffer from severe fluid degradation issues as frequently as carbureted or early fuel-injected cars. However, fluid changes and occasional servicing are essential.

4. **Strong Resale Value for Classics**

As a well-preserved W116 300SD, this car holds significant value in the classic Mercedes market, especially if it has originality, low mileage, and a clean service history.

5. **Comfortable and Spacious Interior**

The W116 offers a luxurious, roomy cabin with high-quality materials (for its time), including leather seats, wood trim, and a well-appointed dashboard. The automatic transmission adds to the comfort, making it a pleasant drive for long distances.

6. **Good Fuel Efficiency for a Diesel**

Diesel engines of this era were more fuel-efficient than gasoline counterparts, making the 300SD a practical choice for daily driving in its time.

7. **Potential for Restoration and Customization**

The W116 platform is well-documented, and parts are still available, allowing for restorations or modifications. Owners can choose between full restorations or maintaining it in original condition.

---

#### **Cons:**

1. **High Maintenance Costs**

Classic Mercedes-Benz vehicles, especially diesels from this era, require specialized knowledge and parts. Maintenance costs can be significant, including:

- **Engine:** The OM617 diesel needs regular oil changes (every 5,000 10,000 miles) with high-quality diesel engine oil. Carbon buildup and injector issues can arise if not properly serviced.

- **Transmission:** While the automatic is reliable, fluid leaks, solenoid failures, or clutch wear in the torque converter can occur over time. Rebuilding or replacing the transmission can be expensive.

- **Electrical System:** Older Mercedes electrical components (ignition, sensors, wiring) are prone to failure and may require restoration or replacement.

- **Suspension and Steering:** Rust, worn bushings, and power steering leaks are common in older cars and can add to maintenance expenses.

2. **Potential for Rust and Structural Issues**

Many W116 models from the late 1970s suffer from rust, particularly in the floor pans, wheel arches, and rear quarter panels. A thorough inspection (including a lift inspection) is critical to assess structural integrity.

3. **Fuel and Emissions Compliance**

- **Diesel Fuel Quality:** Older diesel engines are sensitive to modern low-sulfur diesel fuel. Some owners report issues with fuel injectors or pumps if not using high-quality diesel or additives.

- **Emissions Regulations:** In some regions, classic cars may face restrictions or require modifications to meet modern emissions standards, though this is less of an issue for personal use.

4. **Parts Availability and Lead Times**

While parts for the W116 are still available, some components (especially original or high-quality aftermarket parts) may have long lead times or be expensive. Stocking up on essential parts (belts, hoses, filters) is advisable.

5. **Driving Experience Limitations**

- **Automatic Transmission:** The 4-speed automatic is smooth but lacks modern shift quality. Some owners prefer manual transmissions for better engagement.

- **Braking:** Older brake systems (drums on the rear, potentially worn linings) may require attention. Power-assisted brakes are standard, but pads and rotors wear over time.

- **Handling:** The W116 is heavy and not as nimble as modern cars. Suspension tuning (if restored) can improve comfort but may not match contemporary performance.

6. **Insurance Costs**

Classic car insurance can be expensive, especially for high-value or restored models. Policies may require proof of use (e.g., limited annual mileage) to qualify for lower rates.

7. **Potential for Hidden Mechanical Issues**

- **Timing Belt/Chain:** The OM617 diesel uses a timing chain, which is more durable than belts but can still wear out. Inspect for stretch or noise.

- **Water Pump and Thermostat:** These components often fail in older diesels, leading to overheating.

- **Fuel System:** Diesel injectors and pumps can clog or fail, requiring professional servicing.

- **Exhaust System:** Rust and leaks are common, especially in the muffler and catalytic converter (if equipped).

8. **Depreciation Risk**

While the W116 holds value well, it is not an appreciating asset like some modern classics. If you plan to sell in the future, market fluctuations could affect resale value.

---

### **Ending Conclusion:**

The **Mercedes-Benz W116 300SD (1978 1980) with automatic transmission** is a fantastic choice for enthusiasts who appreciate classic luxury, reliability, and the joy of driving a well-crafted automobile. It offers a blend of comfort, prestige, and engineering that few cars of its era can match. However, it is not a "set-and-forget" vehicle. **Proper maintenance, budgeting for repairs, and thorough pre-purchase inspection are critical** to ensuring a trouble-free ownership experience.

This car is ideal for:

- **Enthusiasts** who enjoy restoring or maintaining classic vehicles.

- **Owners** who prioritize comfort, style, and a smooth automatic driving experience.

- **Collectors** who appreciate the W116 s legacy and are willing to invest in its upkeep.

It is less suitable for:

- **Budget-conscious buyers** who cannot afford regular maintenance or unexpected repairs.

- **Daily drivers** who expect modern reliability without additional effort.

- **Those unwilling to commit time** to learning about diesel engines, automatics, or classic car care.

---

### **Recommendation:** If you are considering this purchase, follow these steps to maximize your chances of a positive experience: 1. **Thorough Inspection:** - Have a **Mercedes specialist or classic car mechanic** perform a pre-purchase inspection, including:

- Engine compression test (to check for wear).

- Transmission fluid condition and leak checks.

- Suspension, steering, and braking system evaluation.

- Rust inspection (especially undercarriage and wheel wells).

- Electrical system test (lights, ignition, sensors).

- Request a **service history** to verify maintenance records.

2. **Budget for Maintenance:** - Allocate **10 15% of the car s value annually** for upkeep, including:

- Oil changes (every 5,000 10,000 miles for diesel).

- Transmission fluid refresh (every 30,000 50,000 miles).

- Brake, suspension, and exhaust system checks.

- Potential major repairs (e.g., water pump, injectors, transmission rebuild).

3. **Consider Restoration vs. Preservation:**

- If the car is **rusted or neglected**, factor in restoration costs (which can range from $10,000 to $50,000 depending on scope).

- If it is **already in good condition**, focus on **preservation** (regular maintenance, storage, and protection from the elements).

4. **Test Drive and Listen for Issues:**

- Pay attention to **unusual noises** (knocking, whining, rattling) during acceleration, braking, or shifting.

- Test the **automatic transmission** for smooth shifts, no hesitation, or slipping.

- Check for **vibrations, steering wander, or unusual handling**.

5. **Purchase from a Reputable Source:**

- Buy from a **trusted dealer, auction with warranty, or a private seller with verifiable history**.

- Avoid "project cars" unless you are prepared for extensive work.

6. **Insure Properly:**

- Obtain **classic car insurance** (e.g., Hagerty, Classic Car Club of America) to protect your investment and ensure fair valuation.

---

### **Final Verdict:**

The **Mercedes-Benz W116 300SD with automatic transmission** is a **fantastic investment for the right buyer** one who values classic luxury, is prepared for maintenance, and enjoys the process of owning a piece of automotive history. If you are willing to put in the effort and budget accordingly, this car will provide **years of reliable, comfortable, and stylish driving**. However,

Details:

Simply drop us a message with your car model and we'll quickly confirm the fitment. Orders placed before 0800 ECT are dispatched on the same day.

part #: 1162702301 prices

  • $917.69-$999.99

specifications autotransmissionsgo:

  • for models: 300sd, W116
  • for makes: Mercedes
  • mpn: 1162702301
  • type: Transmission
  • manufacturer warranty: 30 Day
  • country of origin: Germany
  • performance part: No
  • ipn: 400-51587
  • make: Mercedes-benz

seller autotransmissionsgo:

  • # reviews: 8761
  • rating: 99.7%
  • city: Lumberton, New Jersey

returns autotransmissionsgo:

  • time: 30 Days
  • policy: Returns Accepted
  • paid by: Buyer

offer autotransmissionsgo:

  • started: March 9, 2026
  • availability: In Stock
  • best offers: True
  • quantity: 1
  • sold: 0
  • options: Ship-to-home

shipping autotransmissionsgo:

  • class: Freight
  • type: Fixed
  • service: Flat Rate Freight
  • cost: $275.00

general autotransmissionsgo:

  • Car Truck Parts Accessories > Transmission Drivetrain > Automatic Transmission
  • condition: Used

payments autotransmissionsgo:

  • other
  • wallet: Google-pay
  • credit card: Visa
for models: 300sd, w116, for makes: mercedes, type: transmission, manufacturer warranty: 30 day, country of origin: germany, performance part: no,
manufacturer: mercedes-benz, category: auto parts > car truck parts accessories > transmission drivetrain > automatic transmission, sku: 23094393204249771,
Mercedes 1162702301 Is Similar To:
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3 offers $917.69–$999.99 USD
  • Used. Offer #1 priced at $917.69 + $275.00 shipping estimate = $1192.69* total. +$275.00 shipping
  • Used. Offer #2 priced at $999.99 + $250.00 shipping estimate = $1249.99* total. Storage Location: B1. Mileage: 189,621.+$250.00 shipping
  • Used. Offer #3 priced at $977.95 + $350.00 shipping estimate = $1327.95* total. +$350.00 shipping

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